- Strong cryptography is very powerful when it is done right, but it is not a panacea. Focusing on cryptographic algorithms while ignoring other aspects of security is like defending your house not by building a fence around it, but by putting an immense stake in the ground and hoping that your adversary runs right into it.

- Steganography is an ancient art of hiding information. Digital technology gives us new ways to apply steganographic techniques, including one of the most intriguing—that of hiding information in digital images.

- Although most encryption algorithms are theoretically secure and remain impervious to even the most sophisticated cryptanalytic techniques, new attacks like the timing attack exploit the engineering side of network security.

- Progress in the design and analysis of pseudorandom bit generators over the last decade is surveyed. Background information is provided, and the linear feedback shift registers that serve as building blocks for constructing the generators are examined. Three methods for attacking keystream generators are reviewed, and three techniques for designing them are considered, focusing on how they fail or how their weakness is exposed under the attacks previously described. These techniques are nonlinear feedforward transformation, step control, and multiclocking.

KWoodhammer - KWoodhammer is the all-in-one solution for traditional encryption methods as you know from Enigma, the Pope or the Russian Secret Service (KGB). {(L)GPL}

At Sourceforge ( Production/Stable)

pgpenvelope - pgpenvelope is an interface between Pine and the GNU Privacy Guard (GnuPG). It allows one to perform expected OpenPGP-related operations on messages. Ease of installation, setup, and use are distinguishing features. {(L)GPL}

GnuPG::Interface - GnuPG::Interface is a Perl module interface to interacting with GnuPG. It implements a rich set of filehandle communications with GnuPG and includes a key object organization structure, with information gathered from GnuPG's with-colons option. {(L)GPL}

At Sourceforge ( Production/Stable)

Geheimnis - Geheimnis is a KDE application that "wraps" around encryption programs and their irksome command-line interface, making it easier for users to use these programs. It is made in the style of Win31's PGP Shells that were GUI-based wrappers arou {(L)GPL}

At Sourceforge ( Production/Stable)

WCCO - Visual Basic COM wrappers for the Microsoft CryptoAPI, as described in the book "Cryptography for Visual Basic." {oss}

At Sourceforge ( Production/Stable)

GnuPG - is a complete implementation of the OpenPGP Internet standard. {GPL,GNU}